Why do they turn everything up to 11 and then we wonder why the game is so easy?
They were warned that this would happen in early access. The easiest way to break 5e as a system is to fuck with the action economy. Pretty much the first thing that Larian did was that. Seriously, they didn't even hesitate. The bonus action got overloaded immediately by converting full actions to bonus actions. Then they increased the potency of those bonus actions, like in the case of shove or potions. Haste now gives you a full additional action because they thought that that would probably be easier to understand without considering how that increased the power of the spell substantially. Spells like Flaming Sphere or Spiritual weapon don't require a bonus action to command, they now essentially behave like minions which means that the bonus action is available for other options. The concentration requirements of many summons are completely removed. The thought there might have been that this would open up a wider variety of concentration spells to spellcasters but the situation it created is one in which there is no real downside to summoning all available summons which means that every spell caster with access to summons now has an easy way to tip the action economy in their favor.
To me it feels like the game designers just didn't have a person in the room with them that was familiar enough with 5e to tell them what the ramifications would be of homebrewing the system in that way. Or if there was, that person just didn't have enough say on the direction they were heading and was promptly ignored. They probably didn't really think that this would actually bother anyone, or maybe they dismissed people that voiced their discontent as 5e purists that wouldn't be happy with any change. Well, I'm not a 5e purist. There is plenty about 5e that I consider bad design and would like to see changed. But those changes require a careful, deliberate hand deeply familiar with the system because of how interconnected certain aspects of that system are with others. You can't just give players a bunch of free power and then let them fight encounters that wouldn't even be considered hard under the 5e ruleset.
